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1. BOM line item category setting
When creating or changing a BOM, select R for the BOM line item category, and the VS item tab will pop up. On the variable-size item data screen, it is used to maintain data specific to variable-size items.
Whether this sub-tab is displayed through background configuration:SPRO-Production-Basic Information-BOM-Item Data-Define Configuration Control under the Item Category Path
2. BOM master data maintenance
If the variable size item category is entered as R, after entering the material code, the system configures the control, and the VS entry interface tab pops up for data maintenance. The system calculates the required quantity of BOM components through the maintained variable size and the selected formula.PS: All calculations in BOM are based on SI units.
3. Detailed explanation of parameters
As shown in the figure above, there are the following data items for maintaining calculation-related data specifically for variable-sized items:
3.1. Size
A total of three size fields are used for formula calculation, and can be used to select a part of them. The remaining parameters can only be maintained in the formula through constants, such as pi and so on. These three fields contain the dimensions of the variable-size item that the system uses as variables in the selected formula to calculate the variable-size item quantity.
3.2. Size unit
The size unit is the unit of measurement used to describe the three dimensions of size 1, size 2, and size 3.
If no units are entered for variable size item sizes 1 through 3, the system uses the default base unit of measure defined when configuring the system.Configuration path: SPRO-Production-Basic Information-BOM-BOM Control Data-Define Default Values.
The dimension of the size unit is related to the unit dimension of the variable size item quantity. For example, the size unit is MM, and the calculation formula is area, then the variable size unit is MM2, square millimeter. Units of measurement within the same dimension are automatically converted, eg 10000 MM2 = 1 MM2 (see example below).
If you do not enter a formula, the system calculates the quantity for variable-size items according to a standard formula. As in the above example, with two parameters, the default formula is: Size 1*Size 2
According to the formula, the area can be obtained: 200 MM * 300 MM = 60,000 MM2
In the case of an area formula, the item's variable size item unit must have a size area (MM2, CM2, or M2).
3.3, formula
Maintained here represents the algorithmic formulas used to calculate variable-sized item quantities. In the configuration of the production module, you can use standard calculation formulas, or configure custom calculation formulas in the background:
configuration path:Spro-Production-General Information-BOM-Item Data-Define Variable Size Item Formula
3.4, the required quantity
Maintained here is the piece count of the variable size item required for the component. This entry is used to calculate raw material requirements. The unit PC (piece) is defined as the default value in the standard system, and in the background configuration, define the modification parameters under the BOM control data of the BOM.
Configuration path:Spro-Production-Basic Information-BOM-BOM Control Data-Define Default Values
3.5, variable size quantity
The system uses the entered dimensions and the variable-size item formula to calculate the quantity for the variable-size item. If you do not enter a formula, the variable size item quantity is the product of dimensions 1 and 2 (for dimension area), or the product of dimensions 1, 2, and 3 (for dimension volume). The variable size material quantity is used to calculate the raw material requirement:
Material required quantity = required quantity * (quantity calculated by formula) * required quantity / basic quantity.
3.6. Quantity units of variable size
The unit describes the unit of measure for the quantity of a variable-sized item. The substitute unit for the base unit of measure is maintained in the additional data in the material master record.
There are two places to maintain:
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Shipping unit maintenance
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Multi-unit of measure maintenance (the ratio here does not affect the data of the calculation formula)
4. Test example demonstration:
Material data maintenance : maintain in multi-unit of measure mode
BOM data maintenance : The product: component ratio is 1:5. Size Quantity = Size 1*Size 2. That is, the production of the product requires 5 sub-pieces with a length of 100CM and a width of 1000CM (sub-pieces with an area of 10 square meters).
Order Release : Order Quantity 1. A total of 50 M2 needs to be fed
summary
It feels more suitable for machining to calculate the quantity of cutting materials, and the specification formula of cutting materials is simple, which can be used when configurable materials are not enabled.